feat!: remove rkyv 0.7 support

[sdd]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 95.39%. Comparing base (ccefad4) to head (e491096).

Files with missing lines	Patch %	Lines
src/immutable/float/rkyv_aligned_vec.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@                 Coverage Diff                  @@
##           feature/kiddo-v6     #247      +/-   ##
====================================================
+ Coverage             94.57%   95.39%   +0.82%     
====================================================
  Files                    54       54              
  Lines                  5696     5648      -48     
  Branches               5696     5648      -48     
====================================================
+ Hits                   5387     5388       +1     
+ Misses                  288      240      -48     
+ Partials                 21       20       -1     

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